/*******************************************************************************
 * retroshare-gui/src/gui/FileTransfer/SharedFilesDialog.cpp                   *
 *                                                                             *
 * Copyright (c) 2009 Retroshare Team <retroshare.project@gmail.com>           *
 *                                                                             *
 * This program is free software: you can redistribute it and/or modify        *
 * it under the terms of the GNU Affero General Public License as              *
 * published by the Free Software Foundation, either version 3 of the          *
 * License, or (at your option) any later version.                             *
 *                                                                             *
 * This program is distributed in the hope that it will be useful,             *
 * but WITHOUT ANY WARRANTY; without even the implied warranty of              *
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the                *
 * GNU Affero General Public License for more details.                         *
 *                                                                             *
 * You should have received a copy of the GNU Affero General Public License    *
 * along with this program. If not, see <https://www.gnu.org/licenses/>.       *
 *                                                                             *
 *******************************************************************************/

#include "SharedFilesDialog.h"

#include "rshare.h"
#include "gui/MainWindow.h"
#include "gui/notifyqt.h"
#include "gui/RemoteDirModel.h"
#include "gui/RetroShareLink.h"
#include "gui/ShareManager.h"
#include "gui/common/PeerDefs.h"
#include "gui/common/RsCollectionDialog.h"
#include "gui/msgs/MessageComposer.h"
#include "gui/gxschannels/GxsChannelDialog.h"
#include "gui/gxsforums/GxsForumsDialog.h"
#include "gui/settings/AddFileAssociationDialog.h"
#include "gui/settings/rsharesettings.h"
#include "util/RsQtVersion.h"
#include "util/RsAction.h"
#include "util/misc.h"
#include "util/rstime.h"
#include "util/rsdir.h"

#include <retroshare/rsexpr.h>
#include <retroshare/rsfiles.h>
#include <retroshare/rspeers.h>

#include <QClipboard>
#include <QMenu>
#include <QMessageBox>
#include <QPainter>
#include <QProcess>
#include <QSortFilterProxyModel>
#include <QString>
#include <QStyledItemDelegate>
#include <QTreeView>

#include <set>

#define SHARED_FILES_DIALOG_COLUMN_NAME          0
#define SHARED_FILES_DIALOG_COLUMN_FILENB        1
#define SHARED_FILES_DIALOG_COLUMN_SIZE          2
#define SHARED_FILES_DIALOG_COLUMN_AGE           3
#define SHARED_FILES_DIALOG_COLUMN_FRIEND_ACCESS 4
#define SHARED_FILES_DIALOG_COLUMN_WN_VISU_DIR   5
#define SHARED_FILES_DIALOG_COLUMN_COUNT         6

#define SHARED_FILES_DIALOG_FILTER_STRING "filtered"

/* Images for context menu icons */
#define IMAGE_DOWNLOAD       ":/icons/png/download.png"
#define IMAGE_PLAY           ":/images/start.png"
#define IMAGE_HASH_BUSY      ":/images/settings.png"
#define IMAGE_HASH_DONE      ":/images/accepted16.png"
#define IMAGE_MSG            ":/icons/png/message.png"
#define IMAGE_ATTACHMENT     ":/icons/png/attachements.png"
#define IMAGE_FRIEND         ":/images/peers_16x16.png"
#define IMAGE_COPYLINK       ":/images/copyrslink.png"
#define IMAGE_OPENFOLDER     ":/images/folderopen.png"
#define IMAGE_OPENFILE       ":/images/fileopen.png"
#define IMAGE_LIBRARY        ":/icons/collections.png"
#define IMAGE_CHANNEL        ":/icons/png/channels.png"
#define IMAGE_FORUMS         ":/icons/png/forums.png"
#define IMAGE_COLLCREATE     ":/icons/png/add.png"
#define IMAGE_COLLMODIF      ":/icons/png/pencil-edit-button.png"
#define IMAGE_COLLVIEW       ":/images/find.png"
#define IMAGE_COLLOPEN       ":/icons/collections.png"
#define IMAGE_EDITSHARE      ":/icons/png/pencil-edit-button.png"
#define IMAGE_MYFILES        ":/icons/svg/folders1.svg"
#define IMAGE_UNSHAREEXTRA   ":/icons/cancel.svg"

/*define viewType_CB value */
#define VIEW_TYPE_TREE       0
#define VIEW_TYPE_FLAT       1

#define MAX_SEARCH_RESULTS   3000

#define DISABLE_SEARCH_WHILE_TYPING  1

// Define to avoid using the search in treeview, because it is really slow for now.
//
//#define DONT_USE_SEARCH_IN_TREE_VIEW 1

//#define DEBUG_SHARED_FILES_DIALOG 1

const QString Image_AddNewAssotiationForFile = ":/icons/svg/options.svg";

class SFDSortFilterProxyModel : public QSortFilterProxyModel
{
public:
    SFDSortFilterProxyModel(RetroshareDirModel *dirModel, QObject *parent) : QSortFilterProxyModel(parent)
    {
        m_dirModel = dirModel;

        // Mr.Alice: I removed this because it causes a crash for some obscur reason. Apparently when the model is changed, the proxy model cannot
        // deal with the change by itself. Should I call something specific? I've no idea. Removing this does not seem to cause any harm either.
        //Ghibli: set false because by default in qt5 is true and makes rs crash when sorting, all this decided by Cyril not me :D it works

        setDynamicSortFilter(false);
    }

protected:
    virtual bool lessThan(const QModelIndex &left, const QModelIndex &right) const
    {
        bool dirLeft = (m_dirModel->getType(left) == DIR_TYPE_DIR);
        bool dirRight = (m_dirModel->getType(right) == DIR_TYPE_DIR);

        if (dirLeft ^ dirRight) {
            return dirLeft;
        }

        return QSortFilterProxyModel::lessThan(left, right);
    }

private:
    RetroshareDirModel *m_dirModel;
};

// This class allows to draw the item in the share flags column using an appropriate size

class ShareFlagsItemDelegate: public QStyledItemDelegate
{
public:
    ShareFlagsItemDelegate() {}

    virtual void paint(QPainter *painter, const QStyleOptionViewItem &option, const QModelIndex &index) const
    {
        Q_ASSERT(index.isValid());

        QStyleOptionViewItem opt = option;
        initStyleOption(&opt, index);
        // disable default icon
        opt.icon = QIcon();
        // draw default item
        QApplication::style()->drawControl(QStyle::CE_ItemViewItem, &opt, painter, 0);

        const QRect r = option.rect;

        // get pixmap
        QIcon icon = qvariant_cast<QIcon>(index.data(Qt::DecorationRole));
        QPixmap pix = icon.pixmap(r.size());

        // draw pixmap at center of item
        const QPoint p = QPoint((r.width() - pix.width())/2, (r.height() - pix.height())/2);
        painter->drawPixmap(r.topLeft() + p, pix);
    }
};

SharedFilesDialog::~SharedFilesDialog()
{
    delete tree_model;
    delete flat_model;
    delete tree_proxyModel;
}
/** Constructor */
SharedFilesDialog::SharedFilesDialog(bool remote_mode, QWidget *parent)
  : RsAutoUpdatePage(1000,parent), model(NULL)
{
    /* Invoke the Qt Designer generated object setup routine */
    ui.setupUi(this);

    NotifyQt *notify = NotifyQt::getInstance();
    connect(notify, SIGNAL(filesPreModChanged(bool)), this, SLOT(preModDirectories(bool)));
    connect(notify, SIGNAL(filesPostModChanged(bool)), this, SLOT(postModDirectories(bool)));

    connect(ui.viewType_CB, SIGNAL(currentIndexChanged(int)), this, SLOT(changeCurrentViewModel(int)));
    connect(ui.dirTreeView, SIGNAL(customContextMenuRequested(QPoint)), this,  SLOT( spawnCustomPopupMenu( QPoint ) ) );
    connect(ui.indicatorCBox, SIGNAL(currentIndexChanged(int)), this, SLOT(indicatorChanged(int)));

    tree_model = new TreeStyle_RDM(remote_mode);
    flat_model = new FlatStyle_RDM(remote_mode);

    connect(flat_model, SIGNAL(layoutChanged()), this, SLOT(updateDirTreeView()) );

    // For filtering items we use a trick: the underlying model will use this FilterRole role to highlight selected items
    // while the filterProxyModel will select them using the pre-chosen string "filtered".

    tree_proxyModel = new SFDSortFilterProxyModel(tree_model, this);
    tree_proxyModel->setSourceModel(tree_model);
    tree_proxyModel->setSortCaseSensitivity(Qt::CaseInsensitive);
    tree_proxyModel->setSortRole(RetroshareDirModel::SortRole);
    tree_proxyModel->sort(SHARED_FILES_DIALOG_COLUMN_NAME);
    tree_proxyModel->setFilterRole(RetroshareDirModel::FilterRole);
    QSortFilterProxyModel_setFilterRegularExpression(tree_proxyModel, QString(SHARED_FILES_DIALOG_FILTER_STRING)) ;

    flat_proxyModel = new SFDSortFilterProxyModel(flat_model, this);
    flat_proxyModel->setSourceModel(flat_model);
    flat_proxyModel->setSortCaseSensitivity(Qt::CaseInsensitive);
    flat_proxyModel->setSortRole(RetroshareDirModel::SortRole);
    flat_proxyModel->sort(SHARED_FILES_DIALOG_COLUMN_NAME);
    flat_proxyModel->setFilterRole(RetroshareDirModel::FilterRole);
    QSortFilterProxyModel_setFilterRegularExpression(flat_proxyModel, QString(SHARED_FILES_DIALOG_FILTER_STRING)) ;

    connect(ui.filterClearButton, SIGNAL(clicked()), this, SLOT(clearFilter()));
    connect(ui.filterStartButton, SIGNAL(clicked()), this, SLOT(startFilter()));
    connect(ui.filterPatternLineEdit, SIGNAL(returnPressed()), this, SLOT(startFilter()));
    connect(ui.filterPatternLineEdit, SIGNAL(textChanged(const QString &)), this, SLOT(onFilterTextEdited()));
    //Hidden by default, shown on onFilterTextEdited
    ui.filterClearButton->hide();
    ui.filterStartButton->hide();

//	mFilterTimer = new RsProtectedTimer( this );
//	mFilterTimer->setSingleShot( true ); // Ensure the timer will fire only once after it was started
//	connect(mFilterTimer, SIGNAL(timeout()), this, SLOT(filterRegExpChanged()));

    /* Set header resize modes and initial section sizes  */
    QHeaderView * header = ui.dirTreeView->header () ;
#if QT_VERSION < QT_VERSION_CHECK(5,11,0)
    int charWidth = ui.dirTreeView->fontMetrics().width("_");
#else
    int charWidth = ui.dirTreeView->fontMetrics().horizontalAdvance("_");
#endif

    header->resizeSection ( SHARED_FILES_DIALOG_COLUMN_NAME         , charWidth*100 );
    header->resizeSection ( SHARED_FILES_DIALOG_COLUMN_FILENB       , charWidth*15 );
    header->resizeSection ( SHARED_FILES_DIALOG_COLUMN_SIZE         , charWidth*10 );
    header->resizeSection ( SHARED_FILES_DIALOG_COLUMN_AGE          , charWidth*6 );
    header->resizeSection ( SHARED_FILES_DIALOG_COLUMN_FRIEND_ACCESS, charWidth*10 );
    header->resizeSection ( SHARED_FILES_DIALOG_COLUMN_WN_VISU_DIR  , charWidth*20 );

    header->setStretchLastSection(true);

    /* Set Multi Selection */
    ui.dirTreeView->setSelectionMode(QAbstractItemView::ExtendedSelection);

  /* Hide platform specific features */
  copylinkAct = new QAction(QIcon(IMAGE_COPYLINK), tr( "Copy retroshare Links to Clipboard" ), this );
  connect( copylinkAct , SIGNAL( triggered() ), this, SLOT( copyLink() ) );
  copylinkhtmlAct = new QAction(QIcon(IMAGE_COPYLINK), tr( "Copy retroshare Links to Clipboard (HTML)" ), this );
  connect( copylinkhtmlAct , SIGNAL( triggered() ), this, SLOT( copyLinkhtml() ) );
  sendlinkAct = new QAction(QIcon(IMAGE_COPYLINK), tr( "Send retroshare Links" ), this );
  connect( sendlinkAct , SIGNAL( triggered() ), this, SLOT( sendLinkTo( ) ) );

  removeExtraFileAct = new QAction(QIcon(IMAGE_UNSHAREEXTRA), tr( "Stop sharing this file" ), this );
  connect( removeExtraFileAct , SIGNAL( triggered() ), this, SLOT( removeExtraFile() ) );

    collCreateAct= new QAction(QIcon(IMAGE_COLLCREATE), tr("Create Collection..."), this) ;
    connect(collCreateAct,SIGNAL(triggered()),this,SLOT(collCreate())) ;
    collModifAct= new QAction(QIcon(IMAGE_COLLMODIF), tr("Modify Collection..."), this) ;
    connect(collModifAct,SIGNAL(triggered()),this,SLOT(collModif())) ;
    collViewAct= new QAction(QIcon(IMAGE_COLLVIEW), tr("View Collection..."), this) ;
    connect(collViewAct,SIGNAL(triggered()),this,SLOT(collView())) ;
    collOpenAct = new QAction(QIcon(IMAGE_COLLOPEN), tr( "Download from collection file..." ), this ) ;
    connect(collOpenAct, SIGNAL(triggered()), this, SLOT(collOpen())) ;
}

LocalSharedFilesDialog::LocalSharedFilesDialog(QWidget *parent)
    : SharedFilesDialog(false,parent)
{
    // Hide columns after loading the settings
    ui.dirTreeView->setColumnHidden(SHARED_FILES_DIALOG_COLUMN_WN_VISU_DIR, false) ;
    ui.downloadButton->hide() ;

    // load settings
    processSettings(true);
    // Setup the current view model.
    //
    changeCurrentViewModel(ui.viewType_CB->currentIndex()) ;

    connect(ui.addShares_PB, SIGNAL(clicked()), this, SLOT(addShares())) ;
    connect(ui.checkButton, SIGNAL(clicked()), this, SLOT(forceCheck())) ;

    openfileAct = new QAction(QIcon(IMAGE_OPENFILE), tr("Open File"), this) ;
    connect(openfileAct, SIGNAL(triggered()), this, SLOT(openfile())) ;
    openfolderAct = new QAction(QIcon(IMAGE_OPENFOLDER), tr("Open Folder"), this) ;
    connect(openfolderAct, SIGNAL(triggered()), this, SLOT(openfolder())) ;

    ui.titleBarPixmap->setPixmap(FilesDefs::getPixmapFromQtResourcePath(IMAGE_MYFILES)) ;

    ui.dirTreeView->setItemDelegateForColumn(SHARED_FILES_DIALOG_COLUMN_FRIEND_ACCESS,new ShareFlagsItemDelegate()) ;
}

RemoteSharedFilesDialog::RemoteSharedFilesDialog(QWidget *parent)
    : SharedFilesDialog(true,parent)
{
    ui.dirTreeView->setColumnHidden(SHARED_FILES_DIALOG_COLUMN_FRIEND_ACCESS, false) ;
    ui.dirTreeView->setColumnHidden(SHARED_FILES_DIALOG_COLUMN_WN_VISU_DIR, true) ;
    ui.checkButton->hide() ;

    connect(ui.downloadButton, SIGNAL(clicked()), this, SLOT(downloadRemoteSelected()));
    connect(ui.dirTreeView, SIGNAL(  expanded(const QModelIndex & ) ), this, SLOT(   expanded(const QModelIndex & ) ) );
    connect(ui.dirTreeView, SIGNAL(  doubleClicked(const QModelIndex & ) ), this, SLOT(   expanded(const QModelIndex & ) ) );

    // load settings
    processSettings(true);
    // Setup the current view model.
    //
    changeCurrentViewModel(ui.viewType_CB->currentIndex()) ;

    ui.addShares_PB->hide() ;
}

void LocalSharedFilesDialog::addShares()
{
    ShareManager::showYourself();
}

void SharedFilesDialog::hideEvent(QHideEvent *)
{
    if(model!=NULL)
        model->setVisible(false) ;
}

void SharedFilesDialog::showEvent(QShowEvent *event)
{
    if(model!=NULL)
    {
        std::set<std::string> expanded_indexes,hidden_indexes,selected_indexes ;

        saveExpandedPathsAndSelection(expanded_indexes,hidden_indexes,selected_indexes);

          model->setVisible(true) ;
          model->update() ;

        restoreExpandedPathsAndSelection(expanded_indexes,hidden_indexes,selected_indexes);
    }

    if (!event->spontaneous()) {
        updateFontSize();
    }
}
RemoteSharedFilesDialog::~RemoteSharedFilesDialog()
{
    // save settings
    processSettings(false);
}

LocalSharedFilesDialog::~LocalSharedFilesDialog()
{
    // save settings
    processSettings(false);
}

void LocalSharedFilesDialog::processSettings(bool bLoad)
{
    Settings->beginGroup("LocalSharedFilesDialog");

    if (bLoad) {
        // load settings

        // state of the trees
        ui.dirTreeView->header()->restoreState(Settings->value("LocalDirTreeView").toByteArray());

        // state of splitter
        ui.splitter->restoreState(Settings->value("LocalSplitter").toByteArray());

        // view type
        ui.viewType_CB->setCurrentIndex(Settings->value("LocalViewType").toInt());
    } else {
        // save settings

        // state of trees
        Settings->setValue("LocalDirTreeView", ui.dirTreeView->header()->saveState());

        // state of splitter
        Settings->setValue("LocalSplitter", ui.splitter->saveState());

        // view type
        Settings->setValue("LocalViewType", ui.viewType_CB->currentIndex());
    }

    Settings->endGroup();
}
void RemoteSharedFilesDialog::processSettings(bool bLoad)
{
    Settings->beginGroup("RemoteSharedFilesDialog");

    if (bLoad) {
        // load settings

        // state of the trees
        ui.dirTreeView->header()->restoreState(Settings->value("RemoteDirTreeView").toByteArray());

        // state of splitter
        ui.splitter->restoreState(Settings->value("RemoteSplitter").toByteArray());

        // view type
        ui.viewType_CB->setCurrentIndex(Settings->value("RemoteViewType").toInt());
    } else {
        // save settings

        // state of trees
        Settings->setValue("RemoteDirTreeView", ui.dirTreeView->header()->saveState());

        // state of splitter
        Settings->setValue("RemoteSplitter", ui.splitter->saveState());

        // view type
        Settings->setValue("RemoteViewType", ui.viewType_CB->currentIndex());
    }

    Settings->endGroup();
}

void SharedFilesDialog::changeCurrentViewModel(int viewTypeIndex)
{
//    disconnect( ui.dirTreeView, SIGNAL( collapsed(const QModelIndex & ) ), NULL, NULL );
//    disconnect( ui.dirTreeView, SIGNAL(  expanded(const QModelIndex & ) ), NULL, NULL );

    if(model!=NULL)
        model->setVisible(false) ;

    if(viewTypeIndex==VIEW_TYPE_TREE)
    {
        model = tree_model ;
        proxyModel = tree_proxyModel ;
    }
    else
    {
        model = flat_model ;
        proxyModel = flat_proxyModel ;
    }

    showProperColumns() ;

    std::set<std::string> expanded_indexes,hidden_indexes,selected_indexes ;

    saveExpandedPathsAndSelection(expanded_indexes,hidden_indexes,selected_indexes);

    if(isVisible())
    {
        model->setVisible(true) ;

        model->update() ;
    }

//    connect( ui.dirTreeView, SIGNAL( collapsed(const QModelIndex & ) ), this, SLOT(  collapsed(const QModelIndex & ) ) );

    ui.dirTreeView->setModel(proxyModel);
    ui.dirTreeView->update();

    restoreExpandedPathsAndSelection(expanded_indexes,hidden_indexes,selected_indexes);

    QHeaderView * header = ui.dirTreeView->header () ;
    QHeaderView_setSectionResizeModeColumn(header, SHARED_FILES_DIALOG_COLUMN_NAME, QHeaderView::Interactive);

    ui.dirTreeView->header()->headerDataChanged(Qt::Horizontal, SHARED_FILES_DIALOG_COLUMN_NAME, SHARED_FILES_DIALOG_COLUMN_WN_VISU_DIR) ;

//    recursRestoreExpandedItems(ui.dirTreeView->rootIndex(),expanded_indexes);
    FilterItems();
}

void LocalSharedFilesDialog::showProperColumns()
{
    if(model == tree_model)
    {
        ui.dirTreeView->setColumnHidden(SHARED_FILES_DIALOG_COLUMN_FILENB, false) ;
        ui.dirTreeView->setColumnHidden(SHARED_FILES_DIALOG_COLUMN_FRIEND_ACCESS, false) ;
        ui.dirTreeView->setColumnHidden(SHARED_FILES_DIALOG_COLUMN_WN_VISU_DIR, false) ;
#ifdef DONT_USE_SEARCH_IN_TREE_VIEW
        ui.filterLabel->hide();
        ui.filterPatternLineEdit->hide();
        ui.filterStartButton->hide();
        ui.filterClearButton->hide();
#endif
    }
    else
    {
        ui.dirTreeView->setColumnHidden(SHARED_FILES_DIALOG_COLUMN_FILENB, true) ;
        ui.dirTreeView->setColumnHidden(SHARED_FILES_DIALOG_COLUMN_FRIEND_ACCESS, true) ;
        ui.dirTreeView->setColumnHidden(SHARED_FILES_DIALOG_COLUMN_WN_VISU_DIR, false) ;
#ifdef DONT_USE_SEARCH_IN_TREE_VIEW
        ui.filterLabel->show();
        ui.filterPatternLineEdit->show();
#endif
    }
}
void RemoteSharedFilesDialog::showProperColumns()
{
    if(model == tree_model)
    {
        ui.dirTreeView->setColumnHidden(SHARED_FILES_DIALOG_COLUMN_FILENB, false) ;
        ui.dirTreeView->setColumnHidden(SHARED_FILES_DIALOG_COLUMN_FRIEND_ACCESS, true) ;
        ui.dirTreeView->setColumnHidden(SHARED_FILES_DIALOG_COLUMN_WN_VISU_DIR, true) ;
#ifdef DONT_USE_SEARCH_IN_TREE_VIEW
        ui.filterLabel->hide();
        ui.filterPatternLineEdit->hide();
        ui.filterStartButton->hide();
        ui.filterClearButton->hide();
#endif
    }
    else
    {
        ui.dirTreeView->setColumnHidden(SHARED_FILES_DIALOG_COLUMN_FILENB, true) ;
        ui.dirTreeView->setColumnHidden(SHARED_FILES_DIALOG_COLUMN_FRIEND_ACCESS, false) ;
        ui.dirTreeView->setColumnHidden(SHARED_FILES_DIALOG_COLUMN_WN_VISU_DIR, false) ;
#ifdef DONT_USE_SEARCH_IN_TREE_VIEW
        ui.filterLabel->show();
        ui.filterPatternLineEdit->show();
#endif
    }
}

void LocalSharedFilesDialog::checkUpdate()
{
    /* update */
    if (rsFiles->InDirectoryCheck())
    {
        ui.checkButton->setText(tr("Checking..."));
    }
    else
    {
        ui.checkButton->setText(tr("Check files"));
        ui.hashLabel->setPixmap(FilesDefs::getPixmapFromQtResourcePath(IMAGE_HASH_DONE));
        ui.hashLabel->setToolTip("") ;
    }

    return;
}

void LocalSharedFilesDialog::forceCheck()
{
    rsFiles->ForceDirectoryCheck();
}

void RemoteSharedFilesDialog::spawnCustomPopupMenu( QPoint point )
{
    if (!rsPeers) return; /* not ready yet! */

    QMenu *contextMenu = new QMenu(this);

    QModelIndex idx = ui.dirTreeView->indexAt(point) ;
    if (idx.isValid())
    {

        QModelIndex midx = proxyModel->mapToSource(idx) ;
        if (midx.isValid())
        {

            currentFile = model->data(midx, RetroshareDirModel::FileNameRole).toString() ;
            int type = model->getType(midx) ;
            if ( (type == DIR_TYPE_DIR) || (type == DIR_TYPE_FILE) )
            {
                collCreateAct->setEnabled(true);
                collOpenAct->setEnabled(true);

                QModelIndexList list = ui.dirTreeView->selectionModel()->selectedRows() ;

                if(type == DIR_TYPE_DIR || list.size() > 1)
                {
                    QAction *downloadActI = new QAction(QIcon(IMAGE_DOWNLOAD), tr( "Download..." ), contextMenu ) ;
                    connect( downloadActI , SIGNAL( triggered() ), this, SLOT( downloadRemoteSelectedInteractive() ) ) ;
                    contextMenu->addAction( downloadActI) ;
                }
                else
                {
                    QAction *downloadAct = new QAction(QIcon(IMAGE_DOWNLOAD), tr( "Download" ), contextMenu ) ;
                    connect( downloadAct , SIGNAL( triggered() ), this, SLOT( downloadRemoteSelected() ) ) ;
                    contextMenu->addAction( downloadAct) ;
                }

                contextMenu->addSeparator() ;//------------------------------------
                contextMenu->addAction( copylinkAct) ;
                contextMenu->addAction( sendlinkAct) ;
                contextMenu->addSeparator() ;//------------------------------------
                contextMenu->addAction(QIcon(IMAGE_MSG), tr("Recommend in a message to..."), this, SLOT(recommendFilesToMsg())) ;

                contextMenu->addSeparator() ;//------------------------------------

                QMenu collectionMenu(tr("Collection"), this);
                collectionMenu.setIcon(QIcon(IMAGE_LIBRARY));
                collectionMenu.addAction(collCreateAct);
                collectionMenu.addAction(collOpenAct);
                contextMenu->addMenu(&collectionMenu) ;

            }

        }
    }

    contextMenu = model->getContextMenu(contextMenu);

    if (!contextMenu->children().isEmpty())
        contextMenu->exec(QCursor::pos()) ;

    delete contextMenu;
}

QModelIndexList SharedFilesDialog::getSelected()
{
    QModelIndexList list = ui.dirTreeView->selectionModel()->selectedIndexes() ;
    QModelIndexList proxyList ;
    for (QModelIndexList::iterator index = list.begin(); index != list.end(); ++index ) {
        proxyList.append(proxyModel->mapToSource(*index)) ;
    }

    return proxyList ;
}

void RemoteSharedFilesDialog::expanded(const QModelIndex& indx)
{
#ifdef DEBUG_SHARED_FILES_DIALOG
    std::cerr << "Expanding at " << indx.row() << " and " << indx.column() << " ref=" << indx.internalPointer() << ", pointer at 1: " << proxyModel->mapToSource(indx).internalPointer() << std::endl;
#endif

    model->updateRef(proxyModel->mapToSource(indx)) ;
}
void RemoteSharedFilesDialog::downloadRemoteSelectedInteractive()
{
    /* call back to the model (which does all the interfacing?  */

    std::cerr << "Downloading Files" ;
    std::cerr << std::endl ;

    QModelIndexList lst = getSelected() ;
    model -> downloadSelected(lst,true) ;
}
void RemoteSharedFilesDialog::downloadRemoteSelected()
{
    /* call back to the model (which does all the interfacing?  */

    std::cerr << "Downloading Files" ;
    std::cerr << std::endl ;

    QModelIndexList lst = getSelected() ;
    model -> downloadSelected(lst,false) ;
}

void SharedFilesDialog::copyLinks(const QModelIndexList& lst, bool remote,QList<RetroShareLink>& urls,bool& has_unhashed_files)
{
    std::vector<DirDetails> dirVec;

    model->getDirDetailsFromSelect(lst, dirVec);

    has_unhashed_files = false;

    for (int i = 0, n = dirVec.size(); i < n; ++i)
    {
        const DirDetails& details = dirVec[i];

        if (details.type == DIR_TYPE_DIR)
        {
            auto ft = RsFileTree::fromDirDetails(details,remote);

            QString dir_name = QDir(QString::fromUtf8(details.name.c_str())).dirName();

            RetroShareLink link = RetroShareLink::createFileTree(dir_name,ft->totalFileSize(),ft->numFiles(),QString::fromStdString(ft->toRadix64())) ;

			if(link.valid())
				urls.push_back(link) ;
		}
		else
		{
			if(details.hash.isNull())
			{
				has_unhashed_files = true;
				continue;
			}
			QString name;
			if(details.type == DIR_TYPE_EXTRA_FILE)
			{
				std::string dir,file;
				RsDirUtil::splitDirFromFile(details.name,dir,file) ;
				name = QString::fromStdString(file);
			}
			else
				name = QString::fromUtf8(details.name.c_str());
            RetroShareLink link = RetroShareLink::createFile(name, details.size, details.hash.toStdString().c_str());
			if (link.valid()) {
				urls.push_back(link) ;
			}
		}
	}
}

void SharedFilesDialog::copyLink (const QModelIndexList& lst, bool remote)
{
    QList<RetroShareLink> urls ;
    bool has_unhashed_files = false;

    copyLinks(lst,remote,urls,has_unhashed_files) ;
    RSLinkClipboard::copyLinks(urls) ;

    if(has_unhashed_files)
        QMessageBox::warning(NULL,tr("Some files have been omitted"),tr("Some files have been omitted because they have not been indexed yet.")) ;
}

void SharedFilesDialog::copyLink()
{
    copyLink ( getSelected() , isRemote());
}

void SharedFilesDialog::copyLinkhtml( )
{
    copyLink();

    QString link = QApplication::clipboard()->text();

    QClipboard *clipboard = QApplication::clipboard();
    clipboard->setText("<a href='" +  link + "'> " + link + "</a>");
}

void SharedFilesDialog::sendLinkTo()
{
    copyLink();

    /* create a message */
    MessageComposer *nMsgDialog = MessageComposer::newMsg();
    if (nMsgDialog == NULL) {
        return;
    }

    /* fill it in
    * files are receommended already
    * just need to set peers
    */
    std::cerr << "SharedFilesDialog::sendLinkTo()" << std::endl;
    nMsgDialog->setTitleText(tr("RetroShare Link"));
    nMsgDialog->setMsgText(RSLinkClipboard::toHtml(), true);

    nMsgDialog->show();

    /* window will destroy itself! */
}

void SharedFilesDialog::collCreate()
{
    QModelIndexList lst = getSelected();

    std::vector <DirDetails> dirVec;
    model->getDirDetailsFromSelect(lst, dirVec);

    auto RemoteMode = isRemote();
    FileSearchFlags f = RemoteMode?RS_FILE_HINTS_REMOTE:RS_FILE_HINTS_LOCAL ;

    QString dir_name;

    if(!RemoteMode)
    {
        if(!dirVec.empty())
        {
            const DirDetails& details = dirVec[0];
            dir_name = QDir(QString::fromUtf8(details.name.c_str())).dirName();
        }
    }

    RsFileTree tree;

    for(uint32_t i=0;i<dirVec.size();++i)
        tree.addFileTree(tree.root(),*RsFileTree::fromDirDetails(dirVec[i],RemoteMode,true));

    RsCollectionDialog::openNewCollection(tree);

            //auto ft = RsFileTree::fromDirDetails(details,remote);
}

void SharedFilesDialog::collModif()
{
    std::list<DirDetails> files_info ;

    model->getFileInfoFromIndexList(getSelected(),files_info);

    if(files_info.size() != 1) return ;

    /* make path for downloaded files */
    std::list<DirDetails>::iterator it = files_info.begin();
    DirDetails details = (*it);
    FileInfo info;
    if (!rsFiles->FileDetails(details.hash, RS_FILE_HINTS_EXTRA | RS_FILE_HINTS_LOCAL
                                            | RS_FILE_HINTS_BROWSABLE | RS_FILE_HINTS_NETWORK_WIDE
                                            | RS_FILE_HINTS_SPEC_ONLY, info)) return;

    std::string path;
    path = info.path;

    /* open file with a suitable application */
    QFileInfo qinfo;
    qinfo.setFile(QString::fromUtf8(path.c_str()));
    if (qinfo.exists() && qinfo.absoluteFilePath().endsWith(RsCollection::ExtensionString))
            RsCollectionDialog::editExistingCollection(qinfo.absoluteFilePath());
}

void SharedFilesDialog::collView()
{
    std::list<DirDetails> files_info ;

    model->getFileInfoFromIndexList(getSelected(),files_info);

    if(files_info.size() != 1) return ;

    /* make path for downloaded files */
    std::list<DirDetails>::iterator it = files_info.begin();
    DirDetails details = (*it);
    FileInfo info;
    if (!rsFiles->FileDetails(details.hash, RS_FILE_HINTS_EXTRA | RS_FILE_HINTS_LOCAL
                                            | RS_FILE_HINTS_BROWSABLE | RS_FILE_HINTS_NETWORK_WIDE
                                            | RS_FILE_HINTS_SPEC_ONLY, info)) return;

    std::string path;
    path = info.path;

    /* open file with a suitable application */
    QFileInfo qinfo;
    qinfo.setFile(QString::fromUtf8(path.c_str()));
    if (qinfo.exists() && qinfo.absoluteFilePath().endsWith(RsCollection::ExtensionString))
        RsCollectionDialog::openExistingCollection(qinfo.absoluteFilePath(), true);
}

void SharedFilesDialog::collOpen()
{
    std::list<DirDetails> files_info ;

    model->getFileInfoFromIndexList(getSelected(),files_info);

    if(files_info.size() == 1) {

        /* make path for downloaded files */
        std::list<DirDetails>::iterator it = files_info.begin();
        DirDetails details = (*it);
        FileInfo info;
        if (rsFiles->FileDetails(details.hash, RS_FILE_HINTS_EXTRA | RS_FILE_HINTS_LOCAL
                                  | RS_FILE_HINTS_BROWSABLE | RS_FILE_HINTS_NETWORK_WIDE
                                  | RS_FILE_HINTS_SPEC_ONLY, info)) {

            std::string path;
            path = info.path;

            /* open file with a suitable application */
            QFileInfo qinfo;
            qinfo.setFile(QString::fromUtf8(path.c_str()));
            if (qinfo.exists()) {
                if (qinfo.absoluteFilePath().endsWith(RsCollection::ExtensionString)) {

                    RsCollectionDialog::openExistingCollection(qinfo.absoluteFilePath(),true);
                }
            }
        }
    }

    QString fileName;
    if (!misc::getOpenFileName(nullptr, RshareSettings::LASTDIR_EXTRAFILE, QApplication::translate("RsCollectionFile", "Open collection file"), QApplication::translate("RsCollectionFile", "Collection files") + " (*." + RsCollection::ExtensionString + ")", fileName))
        return ;

    std::cerr << "Got file name: " << fileName.toStdString() << std::endl;

    RsCollection::RsCollectionErrorCode err;
    RsCollection collection(fileName,err);

    if(err == RsCollection::RsCollectionErrorCode::COLLECTION_NO_ERROR)
        RsCollectionDialog::downloadFiles(collection);
}

void LocalSharedFilesDialog::playselectedfiles()
{
  /* call back to the model (which does all the interfacing? */

  std::cerr << "SharedFilesDialog::playselectedfiles()";
  std::cerr << std::endl;

  std::list<std::string> paths;
  model -> getFilePaths(getSelected(), paths);

  std::list<std::string>::iterator it;
  QStringList fullpaths;
  for(it = paths.begin(); it != paths.end(); ++it)
  {
      std::string fullpath;
      rsFiles->ConvertSharedFilePath(*it, fullpath);
      fullpaths.push_back(QString::fromStdString(fullpath));

      std::cerr << "Playing: " << fullpath;
      std::cerr << std::endl;
  }

  playFiles(fullpaths);

  std::cerr << "SharedFilesDialog::playselectedfiles() Completed";
  std::cerr << std::endl;
}

void SharedFilesDialog::recommendFilesToMsg()
{
    std::list<DirDetails> files_info ;

    model->getFileInfoFromIndexList(getSelected(),files_info);

    if(files_info.empty())
        return ;

    /* create a message */

    MessageComposer *nMsgDialog = MessageComposer::newMsg();
    if (nMsgDialog == NULL) {
        return;
    }

    nMsgDialog->setFileList(files_info) ;
    nMsgDialog->setTitleText(tr("Recommendation(s)"));
    nMsgDialog->setMsgText(tr("Recommendation(s)"));
    nMsgDialog->show();

    /* window will destroy itself! */
}

void LocalSharedFilesDialog::openfile()
{
    /* call back to the model (which does all the interfacing? */

    std::cerr << "SharedFilesDialog::openfile" << std::endl;

    QModelIndexList qmil = getSelected();
    model->openSelected(qmil);
}


void LocalSharedFilesDialog::openfolder()
{
    std::cerr << "SharedFilesDialog::openfolder" << std::endl;

	QModelIndexList qmil = getSelected();
	model->openSelected(qmil, true);
}

void  SharedFilesDialog::preModDirectories(bool local)
{
    if (isRemote() == local)
        return;

#ifdef DEBUG_SHARED_FILES_DIALOG
    std::cerr << "About to modify directories. Local=" << local << ". Temporarily disabling sorting" << std::endl;
#endif

    ui.dirTreeView->setSortingEnabled(false);

    std::set<std::string> expanded_indexes,hidden_indexes,selected_indexes;
    saveExpandedPathsAndSelection(expanded_indexes,hidden_indexes,selected_indexes) ;

    /* Notify both models, only one is visible */
    tree_model->preMods();
    flat_model->preMods();

    restoreExpandedPathsAndSelection(expanded_indexes,hidden_indexes,selected_indexes) ;
}

void SharedFilesDialog::saveExpandedPathsAndSelection(std::set<std::string>& expanded_indexes,
                                                      std::set<std::string>& hidden_indexes,
                                                      std::set<std::string>& selected_indexes)
{
    if(ui.dirTreeView->model() == NULL)
        return ;

#ifdef DEBUG_SHARED_FILES_DIALOG
    std::cerr << "Saving expanded items. " << std::endl;
#endif
    for(int row = 0; row < ui.dirTreeView->model()->rowCount(); ++row)
    {
        std::string path = ui.dirTreeView->model()->index(row,0).data(Qt::DisplayRole).toString().toStdString();

        recursSaveExpandedItems(ui.dirTreeView->model()->index(row,0),path,expanded_indexes,hidden_indexes,selected_indexes);
    }
}

void SharedFilesDialog::restoreExpandedPathsAndSelection(const std::set<std::string>& expanded_indexes,
                                                         const std::set<std::string>& hidden_indexes,
                                                         const std::set<std::string>& selected_indexes)
{
    if(ui.dirTreeView->model() == NULL)
        return ;

    // we need to disable this, because the signal will trigger unnecessary update at the friend.

    ui.dirTreeView->blockSignals(true) ;

#ifdef DEBUG_SHARED_FILES_DIALOG
    std::cerr << "Restoring expanded items. " << std::endl;
#endif
    for(int row = 0; row < ui.dirTreeView->model()->rowCount(); ++row)
    {
        std::string path = ui.dirTreeView->model()->index(row,0).data(Qt::DisplayRole).toString().toStdString();
        recursRestoreExpandedItems(ui.dirTreeView->model()->index(row,0),path,expanded_indexes,hidden_indexes,selected_indexes);
    }
    //QItemSelection selection ;

    ui.dirTreeView->blockSignals(false) ;
}

void SharedFilesDialog::expandAll()
{
    if(ui.dirTreeView->model() == NULL || ui.dirTreeView->model() == flat_proxyModel)	// this method causes infinite loops on flat models
        return ;

    ui.dirTreeView->blockSignals(true) ;

#ifdef DEBUG_SHARED_FILES_DIALOG
    std::cerr << "Restoring expanded items. " << std::endl;
#endif
    for(int row = 0; row < ui.dirTreeView->model()->rowCount(); ++row)
    {
        std::string path = ui.dirTreeView->model()->index(row,0).data(Qt::DisplayRole).toString().toStdString();
        recursExpandAll(ui.dirTreeView->model()->index(row,0));
    }

    ui.dirTreeView->blockSignals(false) ;

}

void SharedFilesDialog::recursExpandAll(const QModelIndex& index)
{
    ui.dirTreeView->setExpanded(index,true) ;

    for(int row=0;row<ui.dirTreeView->model()->rowCount(index);++row)
    {
        QModelIndex idx(ui.dirTreeView->model()->index(row,0,index)) ;

        if(ui.dirTreeView->model()->rowCount(idx) > 0)
            recursExpandAll(idx) ;
    }
}

void SharedFilesDialog::recursSaveExpandedItems(const QModelIndex& index,const std::string& path,
                                                std::set<std::string>& exp,
                                                std::set<std::string>& hid,
                                                std::set<std::string>& sel
                                                )
{
    std::string local_path = path+"/"+index.data(Qt::DisplayRole).toString().toStdString();
#ifdef DEBUG_SHARED_FILES_DIALOG
    std::cerr << "at index " << index.row() << ". data[1]=" << local_path << std::endl;
#endif

    if(ui.dirTreeView->selectionModel()->selection().contains(index))
        sel.insert(local_path) ;

    // Disable hidden check as we don't use it and Qt bug: https://bugreports.qt.io/browse/QTBUG-11438
    /*if(ui.dirTreeView->isRowHidden(index.row(),index.parent()))
    {
        hid.insert(local_path) ;
        return ;
    }*/

    if(ui.dirTreeView->isExpanded(index))
    {
#ifdef DEBUG_SHARED_FILES_DIALOG
        std::cerr << "Index " << local_path << " is expanded." << std::endl;
#endif
        if(index.isValid())
            exp.insert(local_path) ;

        for(int row=0;row<ui.dirTreeView->model()->rowCount(index);++row)
#if QT_VERSION >= QT_VERSION_CHECK(5, 8, 0)
            recursSaveExpandedItems(ui.dirTreeView->model()->index(row,0,index),local_path,exp,hid,sel) ;
#else
            recursSaveExpandedItems(index.child(row,0),local_path,exp,hid,sel) ;
#endif
    }
#ifdef DEBUG_SHARED_FILES_DIALOG
    else
        std::cerr << "Index is not expanded." << std::endl;
#endif
}

void SharedFilesDialog::recursRestoreExpandedItems(const QModelIndex& index, const std::string &path,
                                                   const std::set<std::string>& exp,
                                                   const std::set<std::string>& hid,
                                                   const std::set<std::string> &sel)
{
    std::string local_path = path+"/"+index.data(Qt::DisplayRole).toString().toStdString();
#ifdef DEBUG_SHARED_FILES_DIALOG
    std::cerr << "at index " << index.row() << ". data[1]=" << local_path << std::endl;
#endif

    if(sel.find(local_path) != sel.end())
        ui.dirTreeView->selectionModel()->select(index, QItemSelectionModel::Select | QItemSelectionModel::Rows);

    // Disable hidden check as we don't use it and Qt bug: https://bugreports.qt.io/browse/QTBUG-11438
    /*bool invisible = hid.find(local_path) != hid.end();
    ui.dirTreeView->setRowHidden(index.row(),index.parent(),invisible ) ;*/

    //	if(invisible)
    //		mHiddenIndexes.push_back(proxyModel->mapToSource(index));

    if(/*!invisible &&*/ exp.find(local_path) != exp.end())
    {
#ifdef DEBUG_SHARED_FILES_DIALOG
        std::cerr << "re expanding index " << local_path << std::endl;
#endif
        ui.dirTreeView->setExpanded(index,true) ;

        for(int row=0;row<ui.dirTreeView->model()->rowCount(index);++row)
#if QT_VERSION >= QT_VERSION_CHECK(5, 8, 0)
            recursRestoreExpandedItems(ui.dirTreeView->model()->index(row,0,index),local_path,exp,hid,sel) ;
#else
            recursRestoreExpandedItems(index.child(row,0),local_path,exp,hid,sel) ;
#endif
    }
}


void  SharedFilesDialog::postModDirectories(bool local)
{
    if (isRemote() == local)
        return;

    std::set<std::string> expanded_indexes,selected_indexes,hidden_indexes;

    saveExpandedPathsAndSelection(expanded_indexes,hidden_indexes,selected_indexes) ;
#ifdef DEBUG_SHARED_FILES_DIALOG
    std::cerr << "Saving expanded items. " << expanded_indexes.size() << " items found" << std::endl;
#endif

    /* Notify both models, only one is visible */
    tree_model->postMods();
    flat_model->postMods();
    ui.dirTreeView->update() ;

    if (ui.filterPatternLineEdit->text().isEmpty() == false)
        FilterItems();

    ui.dirTreeView->setSortingEnabled(true);

    restoreExpandedPathsAndSelection(expanded_indexes,hidden_indexes,selected_indexes) ;

#ifdef DEBUG_SHARED_FILES_DIALOG
    std::cerr << "****** updated directories! Re-enabling sorting ******" << std::endl;
#endif

#if QT_VERSION < QT_VERSION_CHECK (6, 0, 0)
    QCoreApplication::flush();
#endif
}

class ChannelCompare
{
public:
    bool operator()(const std::pair<std::string,RsGxsGroupId>& id1,const std::pair<std::string,RsGxsGroupId>& id2) const
    {
        return id1.first < id2.first ;
    }
};

void LocalSharedFilesDialog::spawnCustomPopupMenu( QPoint point )
{
    if (!rsPeers) return; /* not ready yet! */

    QModelIndex idx = ui.dirTreeView->indexAt(point) ;
    if (!idx.isValid()) return ;

    QModelIndex midx = proxyModel->mapToSource(idx) ;
    if (!midx.isValid()) return ;


    currentFile = model->data(midx, RetroshareDirModel::FileNameRole).toString() ;
    int type = model->getType(midx) ;
    if (type != DIR_TYPE_DIR && type != DIR_TYPE_FILE && type != DIR_TYPE_EXTRA_FILE) return;

    QMenu contextMnu(this) ;

    bool bIsRsColl = currentFile.endsWith(RsCollection::ExtensionString);
    collCreateAct->setEnabled(true);
    collModifAct->setEnabled(bIsRsColl);
    collViewAct->setEnabled(bIsRsColl);
    collOpenAct->setEnabled(true);

    QMenu collectionMenu(tr("Retroshare Collection"), this);
    collectionMenu.setIcon(QIcon(IMAGE_LIBRARY));
    collectionMenu.addAction(collCreateAct);

    if(bIsRsColl)
        collectionMenu.addAction(collModifAct);
    //collectionMenu.addAction(collViewAct);
    //collectionMenu.addAction(collOpenAct);

    switch (type) {
        case DIR_TYPE_DIR :
            contextMnu.addAction(openfolderAct) ;
            contextMnu.addAction(copylinkAct) ;
            contextMnu.addSeparator() ;//------------------------------------
            contextMnu.addMenu(&collectionMenu) ;
        break ;

        case DIR_TYPE_FILE :
            contextMnu.addAction(openfileAct) ;
            contextMnu.addSeparator() ;//------------------------------------
            contextMnu.addAction(copylinkAct) ;
            contextMnu.addAction(sendlinkAct) ;
            contextMnu.addSeparator() ;//------------------------------------
            contextMnu.addMenu(&collectionMenu) ;
            contextMnu.addSeparator() ;//------------------------------------
            contextMnu.addAction(QIcon(IMAGE_MSG), tr("Recommend in a message to..."), this, SLOT(recommendFilesToMsg())) ;
        break;

        case DIR_TYPE_EXTRA_FILE:
        	contextMnu.addAction(openfileAct) ;
			contextMnu.addAction(openfolderAct) ;
			contextMnu.addSeparator() ;//------------------------------------
			contextMnu.addAction(copylinkAct) ;
			contextMnu.addAction(sendlinkAct) ;
			contextMnu.addAction(removeExtraFileAct) ;

        break ;

        default :
        return ;
    }

    QMenu shareChannelMenu(tr("Share on channel...")) ; // added here because the shareChannelMenu QMenu object is deleted afterwards
    QMenu shareForumMenu(tr("Share on forum...")) ; // added here because the shareChannelMenu QMenu object is deleted afterwards

    if(type != DIR_TYPE_EXTRA_FILE)
    {
        GxsChannelDialog *channelDialog = dynamic_cast<GxsChannelDialog*>(MainWindow::getPage(MainWindow::Channels));

        if(channelDialog != NULL)
        {
            shareChannelMenu.setIcon(QIcon(IMAGE_CHANNEL));

            std::map<RsGxsGroupId,RsGroupMetaData> grp_metas ;
            channelDialog->getGroupList(grp_metas) ;

            std::vector<std::pair<std::string,RsGxsGroupId> > grplist ; // I dont use a std::map because two or more channels may have the same name.

            for(auto it(grp_metas.begin());it!=grp_metas.end();++it)
                if(IS_GROUP_PUBLISHER((*it).second.mSubscribeFlags) && IS_GROUP_SUBSCRIBED((*it).second.mSubscribeFlags))
                    grplist.push_back(std::make_pair((*it).second.mGroupName, (*it).second.mGroupId));

            std::sort(grplist.begin(),grplist.end(),ChannelCompare()) ;

            for(auto it(grplist.begin());it!=grplist.end();++it)
                shareChannelMenu.addAction(QString::fromUtf8((*it).first.c_str()), this, SLOT(shareOnChannel()))->setData(QString::fromStdString((*it).second.toStdString())) ;

            contextMnu.addMenu(&shareChannelMenu) ;
        }

        GxsForumsDialog *forumsDialog = dynamic_cast<GxsForumsDialog*>(MainWindow::getPage(MainWindow::Forums));

        if(forumsDialog != NULL)
        {
            shareForumMenu.setIcon(QIcon(IMAGE_FORUMS));

            std::map<RsGxsGroupId,RsGroupMetaData> grp_metas ;
            forumsDialog->getGroupList(grp_metas) ;

            std::vector<std::pair<std::string,RsGxsGroupId> > grplist ; // I dont use a std::map because two or more channels may have the same name.

            for(auto it(grp_metas.begin());it!=grp_metas.end();++it)
                if(IS_GROUP_SUBSCRIBED((*it).second.mSubscribeFlags))
                    grplist.push_back(std::make_pair((*it).second.mGroupName, (*it).second.mGroupId));

            std::sort(grplist.begin(),grplist.end(),ChannelCompare()) ;

            for(auto it(grplist.begin());it!=grplist.end();++it)
                shareForumMenu.addAction(QString::fromUtf8((*it).first.c_str()), this, SLOT(shareInForum()))->setData(QString::fromStdString((*it).second.toStdString())) ;

            contextMnu.addMenu(&shareForumMenu) ;
        }
    }

    contextMnu.exec(QCursor::pos()) ;
}
void LocalSharedFilesDialog::shareOnChannel()
{
    RsGxsGroupId groupId(qobject_cast<QAction*>(sender())->data().toString().toStdString());

    GxsChannelDialog *channelDialog = dynamic_cast<GxsChannelDialog*>(MainWindow::getPage(MainWindow::Channels));

    if(channelDialog == NULL)
        return ;

    std::list<DirDetails> files_info ;

    QList<RetroShareLink> file_links_list ;
    bool has_unhashed_files ;

    copyLinks(getSelected(),false,file_links_list,has_unhashed_files) ;

    channelDialog->shareOnChannel(groupId,file_links_list) ;
}
void LocalSharedFilesDialog::shareInForum()
{
    RsGxsGroupId groupId(qobject_cast<QAction*>(sender())->data().toString().toStdString());

    GxsForumsDialog *forumsDialog = dynamic_cast<GxsForumsDialog*>(MainWindow::getPage(MainWindow::Forums));

    if(forumsDialog == NULL)
        return ;

    std::list<DirDetails> files_info ;

    QList<RetroShareLink> file_links_list ;
    bool has_unhashed_files ;

    copyLinks(getSelected(),false,file_links_list,has_unhashed_files) ;

    forumsDialog->shareInMessage(groupId,file_links_list) ;
}

//============================================================================

QAction*
LocalSharedFilesDialog::fileAssotiationAction(const QString /*fileName*/)
{
    QAction* result = NULL;

    Settings->beginGroup("FileAssotiations");

    QString key = AddFileAssociationDialog::cleanFileType(currentFile) ;
    if ( Settings->contains(key) )
    {
        result = new QAction(QIcon(IMAGE_PLAY), tr( "Open File" ), this );
        connect( result , SIGNAL( triggered() ),
                 this, SLOT( runCommandForFile() ) );

        currentCommand = (Settings->value( key )).toString();
    }
    else
    {
        result = new QAction(QIcon(Image_AddNewAssotiationForFile),
                             tr( "Set command for opening this file"), this );
        connect( result , SIGNAL( triggered() ),
                 this,    SLOT(   tryToAddNewAssotiation() ) );
    }

    Settings->endGroup();

    return result;
}

//============================================================================

void
LocalSharedFilesDialog::runCommandForFile()
{
    QStringList tsl;
    tsl.append( currentFile );
    QProcess::execute( currentCommand, tsl);
}

//============================================================================

void
LocalSharedFilesDialog::tryToAddNewAssotiation()
{
    AddFileAssociationDialog afad(true, this);//'add file assotiations' dialog

    afad.setFileType(AddFileAssociationDialog::cleanFileType(currentFile));

    int ti = afad.exec();

    if (ti==QDialog::Accepted)
    {
        QString currType = afad.resultFileType() ;
        QString currCmd = afad.resultCommand() ;

        Settings->setValueToGroup("FileAssotiations", currType, currCmd);
    }
}

void SharedFilesDialog::indicatorChanged(int index)
{
    static uint32_t correct_indicator[4] = { IND_ALWAYS,IND_LAST_DAY,IND_LAST_WEEK,IND_LAST_MONTH } ;

    model->changeAgeIndicator(correct_indicator[index]);

    ui.dirTreeView->update(ui.dirTreeView->rootIndex());

    if (correct_indicator[index] != IND_ALWAYS)
        ui.dirTreeView->sortByColumn(SHARED_FILES_DIALOG_COLUMN_AGE, Qt::AscendingOrder);
    else
        ui.dirTreeView->sortByColumn(SHARED_FILES_DIALOG_COLUMN_NAME, Qt::AscendingOrder);

    updateDisplay() ;
}

void SharedFilesDialog::onFilterTextEdited()
{
    QString text = ui.filterPatternLineEdit->text();

    if (text.isEmpty()) {
        ui.filterClearButton->hide();
    } else {
        ui.filterClearButton->show();
    }

    if (text == lastFilterString) {
        ui.filterStartButton->hide();
    } else {
        ui.filterStartButton->show();
    }

    if(text.length() > 0 && text.length() < 3)
    {
        ui.filterStartButton->setEnabled(false) ;
        ui.filterPatternFrame->setToolTip(tr("Search string should be at least 3 characters long.")) ;
        return ;
    }

    ui.filterStartButton->setEnabled(true) ;
    ui.filterPatternFrame->setToolTip(QString());

    //FilterItems();
#ifndef DISABLE_SEARCH_WHILE_TYPING
    mFilterTimer->start( 500 ); // This will fire filterRegExpChanged after 500 ms.
    // If the user types something before it fires, the timer restarts counting
#endif
}

#ifdef DEPRECATED_CODE
void SharedFilesDialog::filterRegExpChanged()
{
    QString text = ui.filterPatternLineEdit->text();

    if(text.length() > 0 && proxyModel == tree_proxyModel)
    {
        std::list<DirDetails> result_list ;
        std::list<std::string> keywords;

        QStringList lst = text.split(" ",QString::SkipEmptyParts) ;

        for(auto it(lst.begin());it!=lst.end();++it)
            keywords.push_back((*it).toStdString());

        FileSearchFlags flags = isRemote()?RS_FILE_HINTS_REMOTE:RS_FILE_HINTS_LOCAL;

        if(keywords.size() > 1)
        {
            RsRegularExpression::NameExpression exp(RsRegularExpression::ContainsAllStrings,keywords,true);
            rsFiles->SearchBoolExp(&exp,result_list, flags) ;
        }
        else
            rsFiles->SearchKeywords(keywords,result_list, flags) ;

        uint32_t nb_results = result_list.size();

        if(nb_results > MAX_SEARCH_RESULTS)
        {
            ui.filterStartButton->setEnabled(false) ;
            ui.filterPatternFrame->setToolTip(tr("More than 3000 results. Add more/longer search words to select less.")) ;
            return ;
        }
    }

    ui.filterStartButton->setEnabled(true) ;
    ui.filterPatternFrame->setToolTip(QString());
}
#endif

/* clear Filter */
void SharedFilesDialog::clearFilter()
{
    ui.filterPatternLineEdit->clear();
    ui.filterPatternLineEdit->setFocus();

    startFilter();
}

/* clear Filter */
void SharedFilesDialog::startFilter()
{
    ui.filterStartButton->hide();
    lastFilterString = ui.filterPatternLineEdit->text();

    FilterItems();
}

void SharedFilesDialog::updateDirTreeView()
{
    if (model == flat_model)
    {
        size_t maxSize = 0;
        FlatStyle_RDM* flat = dynamic_cast<FlatStyle_RDM*>(flat_model);
        if (flat && flat->isMaxRefsTableSize(&maxSize))
        {
            ui.dirTreeView->setToolTip(tr("Warning: You reach max (%1) files in flat list. No more will be added.").arg(maxSize));
            return;
        }
    }
    ui.dirTreeView->setToolTip("");
}

//#define DEBUG_SHARED_FILES_DIALOG

#ifdef DEPRECATED_CODE
// This macro make the search expand all items that contain the searched text.
// A bug however, makes RS expand everything when nothing is selected, which is a pain.

#define EXPAND_WHILE_SEARCHING 1

void recursMakeVisible(QTreeView *tree,const QSortFilterProxyModel *proxyModel,const QModelIndex& indx,uint32_t depth,const std::vector<std::set<void*> >& pointers,QList<QModelIndex>& hidden_list)
{
#ifdef DEBUG_SHARED_FILES_DIALOG
    for(uint32_t i=0;i<depth;++i) std::cerr << "  " ; std::cerr << "depth " << depth << ": current ref=" << proxyModel->mapToSource(indx).internalPointer() << std::endl;
#endif
    int rowCount = tree->model()->rowCount(indx);
    const std::set<void*>& ptrs(pointers[depth+1]) ;

#ifdef DEBUG_SHARED_FILES_DIALOG
    std::cerr << "Pointers are: " << std::endl;
    for(auto it(ptrs.begin());it!=ptrs.end();++it)
        std::cerr << *it << std::endl;
#endif
    tree->setRowHidden(indx.row(), indx.parent(), false) ;
#ifdef EXPAND_WHILE_SEARCHING
    tree->setExpanded(indx,true) ;
#endif

    bool found = false ;

    for (int row = 0; row < rowCount; ++row)
    {
        QModelIndex child_index = indx.child(row,0);

        if(ptrs.find(proxyModel->mapToSource(child_index).internalPointer()) != ptrs.end())
        {
#ifdef DEBUG_SHARED_FILES_DIALOG
            for(uint32_t i=0;i<depth+1;++i) std::cerr << "  " ;	std::cerr << "object " << proxyModel->mapToSource(child_index).internalPointer() << " visible" << std::endl;
#endif
            recursMakeVisible(tree,proxyModel,child_index,depth+1,pointers,hidden_list) ;
            found = true ;
        }
        else
        {
            tree->setRowHidden(child_index.row(), indx, true) ;
            hidden_list.push_back(proxyModel->mapToSource(child_index)) ;
#ifdef EXPAND_WHILE_SEARCHING
            tree->setExpanded(child_index,false) ;
#endif

#ifdef DEBUG_SHARED_FILES_DIALOG
            for(uint32_t i=0;i<depth+1;++i) std::cerr << "  " ;	std::cerr << "object " << proxyModel->mapToSource(child_index).internalPointer() << " hidden" << std::endl;
#endif
        }
    }

    if(!found && depth == 0)
    {
        tree->setRowHidden(indx.row(), indx.parent(), true) ;
        hidden_list.push_back(proxyModel->mapToSource(indx)) ;
    }
}

void SharedFilesDialog::restoreInvisibleItems()
{
    std::cerr << "Restoring " << mHiddenIndexes.size() << " invisible indexes" << std::endl;

    for(QList<QModelIndex>::const_iterator it(mHiddenIndexes.begin());it!=mHiddenIndexes.end();++it)
    {
        QModelIndex indx = proxyModel->mapFromSource(*it);

        if(indx.isValid())
            ui.dirTreeView->setRowHidden(indx.row(), indx.parent(), false) ;
    }

    mHiddenIndexes.clear();
}
#endif

class QCursorContextBlocker
{
    public:
        QCursorContextBlocker(QWidget *w)
            : mW(w)
        {
            mW->setCursor(Qt::WaitCursor);
            mW->blockSignals(true) ;
        }

        ~QCursorContextBlocker()
        {
            mW->setCursor(Qt::ArrowCursor);
            mW->blockSignals(false) ;
        }

    private:
        QWidget *mW ;
};

void SharedFilesDialog::FilterItems()
{
#ifdef DONT_USE_SEARCH_IN_TREE_VIEW
    if(proxyModel == tree_proxyModel)
        return;
#endif

    QString text = ui.filterPatternLineEdit->text();

    if(mLastFilterText == text)	// do not filter again if we already did. This is an optimization
    {
#ifdef DEBUG_SHARED_FILES_DIALOG
        std::cerr << "Last text is equal to text. skipping" << std::endl;
#endif
        return ;
    }

#ifdef DEBUG_SHARED_FILES_DIALOG
    std::cerr << "New last text. Performing the filter on string \"" << text.toStdString() << "\"" << std::endl;
#endif
    mLastFilterText = text ;

    QCursorContextBlocker q(ui.dirTreeView) ;

    QCoreApplication::processEvents() ;

    std::list<DirDetails> result_list ;
    uint32_t found = 0 ;

    if(text == "")
    {
        model->filterItems(std::list<std::string>(),found) ;
        model->update() ;
        return ;
    }

    if(text.length() < 3)
        return ;

    //FileSearchFlags flags = isRemote()?RS_FILE_HINTS_REMOTE:RS_FILE_HINTS_LOCAL;
    QStringList lst = text.split(" ",QtSkipEmptyParts) ;
    std::list<std::string> keywords ;

    for(auto it(lst.begin());it!=lst.end();++it)
        keywords.push_back((*it).toStdString());

    model->filterItems(keywords,found) ;
    model->update() ;

    if(found > 0)
        expandAll();

    if(found == 0)
        ui.filterPatternFrame->setToolTip(tr("No result.")) ;
    else if(found > MAX_SEARCH_RESULTS)
        ui.filterPatternFrame->setToolTip(tr("More than %1 results. Add more/longer search words to select less.").arg(MAX_SEARCH_RESULTS)) ;
    else
        ui.filterPatternFrame->setToolTip(tr("Found %1 results.").arg(found)) ;

#ifdef DEBUG_SHARED_FILES_DIALOG
    std::cerr << found << " results found by search." << std::endl;
#endif
}

void SharedFilesDialog::removeExtraFile()
{
    std::list<DirDetails> files_info ;

    model->getFileInfoFromIndexList(getSelected(),files_info);

    for(auto it(files_info.begin());it!=files_info.end();++it)
    {
        std::cerr << "removing file " << (*it).name << ", hash = " << (*it).hash << std::endl;

        rsFiles->ExtraFileRemove((*it).hash);
    }
}

#ifdef DEPRECATED_CODE
bool SharedFilesDialog::flat_FilterItem(const QModelIndex &index, const QString &text, int /*level*/)
{
    if(index.data(RetroshareDirModel::FileNameRole).toString().contains(text, Qt::CaseInsensitive))
    {
        ui.dirTreeView->setRowHidden(index.row(), index.parent(), false);
        return false ;
    }
    else
    {
        ui.dirTreeView->setRowHidden(index.row(), index.parent(), true);
        mHiddenIndexes.push_back(proxyModel->mapToSource(index));
        return true ;
    }
}

bool SharedFilesDialog::tree_FilterItem(const QModelIndex &index, const QString &text, int level)
{
    bool visible = true;

    if (text.isEmpty() == false) {
        // better use RetroshareDirModel::getType, but its slow enough
        if (/*index.parent().isValid()*/ level >= 1) {
            if (index.data(RetroshareDirModel::FileNameRole).toString().contains(text, Qt::CaseInsensitive) == false) {
                visible = false;
            }
        } else {
            visible = false;
        }
    }

    int visibleChildCount = 0;
    int rowCount = ui.dirTreeView->model()->rowCount(index);
    for (int row = 0; row < rowCount; ++row) {
        if (tree_FilterItem(ui.dirTreeView->model()->index(row, index.column(), index), text, level + 1)) {
            ++visibleChildCount;
        }
    }

    if (visible || visibleChildCount) {
        ui.dirTreeView->setRowHidden(index.row(), index.parent(), false);
    } else {
        {
        ui.dirTreeView->setRowHidden(index.row(), index.parent(), true);
        mHiddenIndexes.push_back(proxyModel->mapToSource(index));
        }
    }

    return (visible || visibleChildCount);
}
#endif

void SharedFilesDialog::updateFontSize()
{
#if defined(Q_OS_DARWIN)
    int customFontSize = Settings->valueFromGroup("File", "MinimumFontSize", 13).toInt();
#else
    int customFontSize = Settings->valueFromGroup("File", "MinimumFontSize", 11).toInt();
#endif
    QFont newFont = ui.dirTreeView->font();
    if (newFont.pointSize() != customFontSize) {
        newFont.setPointSize(customFontSize);
        QFontMetricsF fontMetrics(newFont);
        int iconHeight = fontMetrics.height()*1.5;
        ui.dirTreeView->setFont(newFont);
        ui.dirTreeView->setIconSize(QSize(iconHeight, iconHeight));
    }
}
